JPH02232691A - Keyboard for electronic musical instrument - Google Patents

Abstract

PURPOSE:To obtain an optional touch that a player like by providing a control means which finds a reaction force to be given to a key from the position the key detected by a position sensor and controls the driving of the electromagnet of a driving part. CONSTITUTION:The electromagnet 14 is installed at the driving part 12 corresponding to a magnet 10 fitted to the key 2 and driven to make a magnetic force operate on the magnet 10, thereby giving the key 2 the reaction force. A position sensor 22 detects the position of the key 2 according to key depression and the control means 24 finds the reaction force to be given to the key 2 from the position of the key 2 detected by the position sensor 22 and controls the driving of the electromagnet 14 of the driving part 12. Thus, the key 2 is given the reaction force with the magnetic force operating between the electromagnet 14 and magnet 10. For example, the key is pressed strongly, the magnetic force of the electromagnet increases to increase the reaction force to the key, but when the key is pressed gently, the magnetic force of the electromagnet decreases to decrease the reaction force to the key. Consequently, an optional feeling of touching is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a keyboard for an electronic musical instrument that controls the touch characteristics of the keys according to the timbre, playing style, player's preference, etc. [Prior Art] Conventionally, in the keyboard of an electronic keyboard instrument, for example, as shown in FIG. 6(A), a key 2 is rotatably supported around a fulcrum 4, and this IS! Attach a weight 6 to the back of the touch side of 2, and attach a spring 8 to the opposite side.
112 is held in equilibrium by the weight 6 and spring 8. In such a keyboard, the spring 8 expands depending on the depth of the key depression and keystroke (hereinafter simply referred to as keystroke), but the restoring force of the spring 8 acts on the key 2 as a reaction force, so you can feel the touch. It will be done. In addition, as shown in FIG. 6(B), by installing a weight 6 on the upper surface of the non-touch side of the key 2, this weight 6
and 9!2 keep key 2 in an equilibrium state,
When a key is pressed, the mass of the weight 6 acts as a reaction force, providing a touch sensation.

In this way, the keyboards of conventional electronic keyboard instruments provide a sense of touch to the player by applying a reaction force due to mass using an action mechanism similar to that of a piano. [Problems to be Solved by the Invention] By the way, in such a keyboard, the reaction force is obtained by mass, so each key 2 has mass, and the overall weight of the key 2 becomes heavy. It is difficult to change the reaction force set by the restoring force of the spring 8,
For this reason, it has been impossible to control the touch feeling according to the timbre, playing style, player's preference, or the like.

Therefore, this invention realizes a lightweight key, and
Our first priority is to provide keyboards for electronic musical instruments that allow you to feel the touch of your choice.
The purpose of

A second object of the present invention is to provide a keyboard for an electronic musical instrument that provides a feeling of touch depending on the type of keystroke.

A third object of the present invention is to provide a keyboard for an electronic musical instrument in which an arbitrary touch feeling can be selected.

[Means for Solving the Problems] In order to achieve the first object, the keyboard for an electronic musical instrument of the present invention is provided with an electromagnet attached to the key corresponding to the ripple magnet, and drives the am magnet to generate the above-mentioned a drive unit that applies a magnetic force to the key and applies a reaction force to the key; a position sensor that detects the position of the key according to the keystroke; and a position sensor that detects the position of the key according to the position of the key detected by the position sensor. and control means (touch control section 24) for controlling the drive of the electromagnet of the drive section by determining the reaction force to be applied to the key.

Further, in order to achieve the second object of the electronic musical instrument keyboard of the present invention, the control means calculates the velocity or acceleration of the key from the position of the key detected by the position sensor, and The reaction force to be applied to the key is calculated by referring to position, velocity, or acceleration. Furthermore, in order to achieve the third object, the keyboard for an electronic musical instrument of the present invention is provided with a storage means for storing arbitrary touch data corresponding to a keystroke LM m, and in the control means, performance conditions are stored from the storage means. The reaction force is calculated by referring to the touch data read out according to the touch data.

[For production]

In the keyboard for an electronic musical instrument of the present invention, the position of the key as it is pressed is detected by the position sensor, and the control means obtains a control output representing the reaction force to be applied to the key according to the position. This control output drives the IT magnet in the drive unit, and the magnetic force acting between the electromagnets applies a reaction force to the key. For example, if you press a key strongly, the magnetic force of the electromagnet increases and the reaction force against the key increases, and if you press the key weakly, the magnetic force of the electromagnet decreases and the reaction force against the key becomes smaller, so the touch feeling corresponding to the keystroke will be different. Since it is possible to calculate and set any reaction force according to the change in the position of the key, the relationship between the pressed key and the reaction force applied to the key can be changed arbitrarily, and the relationship between the pressed key and the reaction force applied to the key can be changed arbitrarily, and the timbre, playing style, or player's You can change the touch feeling according to your preference.

In addition, if the velocity or acceleration of the key is calculated from the position of the key detected by the position sensor, and the reaction force to be applied to the key is calculated by referring to the position, velocity, or acceleration of the key, the position of the key, You can understand the keystroke status of velocity or acceleration, and the tone,
A touch feeling can be obtained depending on the playing style, the player's preference, the player's keystroke mode, etc.

Then, by calculating the reaction force by referring to the touch data read out according to the keystroke from the storage means that stores the touch data corresponding to the touch, the touch data can be adjusted according to the timbre, playing style, player's preference, etc. By making a selection, it is possible to obtain a touch feeling according to the timbre, playing style, player's preference, player's keystroke mode, etc. by referring to the tuff data.

〔Example〕

Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of an electronic musical instrument keyboard according to the present invention. A plurality of keys 2 are provided on the keyboard, and each key 2 is supported so as to rotate in accordance with the keystrokes around a fulcrum 4.
For example, a magnet 10 is attached to the non-touch end of the magnet 10, with the upper surface serving as the N pole and the lower surface serving as the S pole. A driving unit l2 is installed which applies a magnetic force to the magnet 10 of the key 2 to maintain the key 2 horizontally and also applies a necessary reaction force when the key is pressed to give the player a sense of touch. One or more sets of electromagnets l4 forming a C-shape are installed in the drive unit 12 with a certain gap between them and the pole face of the magnet 10, and one or more sets of electromagnets l4 are installed in the yoke of the electromagnet 14. A set of coils 16 are wound, this coil 16 being made of a conductor or a superconductor. In this embodiment, the magnetic pole N of the magnet 10 is
With the magnetic pole N on the side and the magnetic pole S on the magnetic pole S side, the magnet 1
0 and the electromagnet 14 so that a repulsive force acts on each other.

A position sensor 22 is installed in the musical instrument body 20 to detect the position of the key 2, which indicates the depth of the keystroke.
For example, the position of the key 2 is electrically detected without contacting the key 2, and the position sensor 22 obtains position data Xi of the key 2 representing the depth of keystroke as a keystroke state.

This position data Xi is applied as a control input to the touch control unit 24, which is installed as a control means that calculates a reaction force to achieve a desired touch feeling and generates a control output. Differentiating circuits 26 and 28 are installed in this touch control section 24, and the differentiating circuit 26 uses position data X. Velocity data of key 2, which is the amount of change in position per unit time by differentiating
．． is obtained, and the differentiating circuit 28 differentiates the velocity data (1) to obtain acceleration data (α1) of the key 2, which is the amount of change per unit time in the velocity data (2). These position data Xi, velocity data ■, and acceleration data α, are I! 2 is added as calculation input data representing the keystroke mode to a calculation circuit 30 installed to calculate the reaction force to be applied to the keystroke. Therefore, in the arithmetic circuit 30, the position data Xi, the velocity data (■), or the acceleration data α. The initial of key 2 is determined by referring to part or all of the key manual data consisting of The touch data T is calculated together with the counter data F0 to be given to the key 2 in response to the touch.

The touch curve memory 32 also stores a plurality of touch curves corresponding to performance conditions such as tone color, and also stores tone P. ．． 2 and 3 show examples of general touch curves stored in the touch curve memory 32. The touch curve shown in Figure 2 represents the reaction force F felt by the finger depending on the position (depth) X of the keystroke with the speed of the keystroke as a parameter. After pressing to position X0,
Its position X. The reaction force F felt when pressing a key while accelerating from
represents. In this case, the keystroke speed of the parameter is
Touch curve a is the slowest one-touch curve a, b, c,
The speed increases in the order of d.

The drive circuit 18 has a calculation circuit 30 as a drive input.
The inverse force data F0 obtained in is added to generate a drive current corresponding to the inverse force F0, and this drive current is supplied to the coil 16. With this configuration, when the electromagnet 14 is driven, a repulsive force acts between the magnetic poles of the magnet 10 and the electromagnet 14, and the key 2 is held horizontally.

When the player presses the key 2 with his finger as shown by the dashed line, the position sensor 22 detects the depth of the key 2 due to the key press, that is, the change in its position, and the position data X. is obtained.

Based on this position data X1, velocity data V. is obtained, and acceleration data αi is obtained from the differentiating circuit 28 based on this velocity data.

By the way, among the touch curves stored in the touch curve memory 32, the touch curve corresponding to the external designation of the tone P1 is selected, for example, the touch curve shown in FIG. 2 or 3 is selected. If the speed data ■.
The touch curves a to d are selected according to the position data X.
It is read out according to the

Then, in the arithmetic circuit 30, the position data X. , speed data■. and acceleration data α. and touch curve memory 3
The reaction force F0 to be applied to the key 2 is calculated from the reaction force F read from the key 2. When the calculation output representing this reaction force data F0 is applied to the drive circuit 18, a drive current corresponding to the reaction force data F0 is supplied from the drive circuit l8 to the coil l6, and the electromagnet 14 is driven in response to the keystroke. In this case, a magnet 1 is placed on the magnetic pole surface.
Due to the generation of N and S poles opposite to the N and S poles of 0, a repulsive force acts between each magnetic pole of the magnet 10 and the electromagnet 4,
As the N pole of the magnet 10 approaches the N pole of the electromagnet 14 by keystroke, the repulsive force becomes larger. For example, if you press key 2 strongly and quickly, you will get a strong anti-key data Fo.
Furthermore, if the key 2 is operated weakly and slowly, a weak reaction force F0 is obtained, which corresponds to the keystroke, and a touch feeling based on the reaction force F read out from the touch curve memory 32 is obtained.

Then, if electromagnet l4 is composed of a superconducting magnet,
The electromagnet 14 can be made smaller and generate a strong magnetic force, and vj! It is possible to realize the necessary touch sensation along with the position control described in step 2.

By the way, touch intensity is not fixed, and varies depending on the speed of keystroke, acceleration, and position of acceleration, as well as timbre, playing style, and player's preferences. It also depends on the keyboard structure. Therefore, the touch control section 24 stores it in the touch curve memory 32 or other storage table, reads it out according to the performance conditions, and performs interpolation calculations as necessary to find the most suitable inverse curve data F0. Bye. In the embodiment described above, the electromagnet 14 consisting of a single yoke was shown in the driving part l2, but as shown in FIG. 4, electromagnets 14a and 14b having two L-shaped yokes
is an E-shaped electromagnet, and by passing a drive current through each coil 16a and 16b individually, the electromagnet 14a acts as an N pole on the upper surface side of the N pole of the magnet 10 and an S pole on the end surface side of the magnet 10, Further, the electromagnet 14b may have an S pole acting on the upper surface side of the S pole of the magnet 10, and an N pole acting on the end surface side thereof. In this way, the magnet 10 and the electromagnets 14a, 1
The key 2 can be held horizontally by applying a repulsive force and an attractive force between the key 2 and the key 4b, and a delicate touch feeling can be realized by the mutual action of the electromagnets 14a and 14b depending on the keying state. Can be done. In this way, one or more sets of electromagnets may be installed in the drive unit 12, and the position of the key 2 may be controlled by applying a necessary repulsive force or attractive force to the magnet IO.
The number and installation location can be changed. For example, as shown in FIG.
, 14C, 14D, and 14E, the position control may be performed by applying attractive force and repulsion force to the magnet 10 of the key 2 by the electromagnets 14A, 14E, or linear control by the electromagnets 14B, 14c, and 14D on the edges of the magnet 10. A motor structure may also be used, and an electromagnet 14A. -14E may be used in a configuration in which both are used in combination.

Further, in the embodiment, the magnet 10 attached to the key 2 is installed with the magnetic pole surface facing the upper and lower surfaces, but the magnetic rod surface may be installed in the axial direction of the key 2.

〔Effect of the invention〕

As explained above, according to the present invention, the following effects can be obtained.

(a) Since the position of the keys can be controlled horizontally using magnetic force, it is possible to reduce the weight of the keys, and by controlling the reaction force according to keystrokes using magnetic force, it is possible to obtain a desired touch feeling, which can improve the tone, playing style, and player. It is possible to realize touch sensations that correspond to the player's preferences, keyboard structure, etc., and it is also possible to realize subtle touch expressions depending on the playing style.

(b)! The position, speed, or acceleration of the keystrokes can be grasped, and a touch feeling that corresponds to the player's keystroke style can be realized. (C) Touch data can be selected according to the tone, playing style, player's preference, etc., and any touch feeling can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the electronic musical instrument keyboard of the present invention, and FIGS. 2 and 3 show touch curves stored in the touch curve memory of the electronic musical instrument keyboard shown in FIG. 1. 4 and 5 are diagrams showing a modification of the driving section of the keyboard for an electronic musical instrument shown in FIG. 1, and FIG. 6 is a diagram showing a conventional keyboard for an electronic musical instrument. 2... Key 10... Magnet 12... Drive unit 1 4, 14a, 14b, 14A to 14E
-----...Electromagnet 22...Position sensor 24...Touch control unit (control means) 32...Touch curve memory (storage means) -X (position) Touch curve xo -X (position) 1) Conventional example of keyboard with touch curve as shown in Fig.

Claims (1)

[Claims] 1. A drive unit in which an electromagnet is installed corresponding to the magnet attached to the key, and drives the electromagnet to apply a magnetic force between it and the magnet, thereby imparting a reaction force to the key. a position sensor that detects the position of the key in response to a keystroke; and driving the electromagnet of the drive unit by determining a reaction force to be applied to the key according to the position of the key detected by the position sensor. A keyboard for an electronic musical instrument, characterized in that it is equipped with a control means for controlling. 2. The control means calculates the velocity or acceleration of the key from the position of the key detected by the position sensor, and calculates the reaction force to be applied to the key by referring to the position, velocity or acceleration of the key. 2. The keyboard for an electronic musical instrument according to claim 1, wherein the electronic musical instrument keyboard calculates . 3. A storage means for storing arbitrary touch data corresponding to the keystroke mode is installed, and the control means calculates the reaction force by referring to the touch data read from the storage means according to the performance conditions. The keyboard for an electronic musical instrument according to claim 1, characterized in that: